Landau damping

physics

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Last updated

June 30, 2026

Quick Summary

Landau damping is a phenomenon in plasma physics where waves lose energy to particles that are moving at approximately the same speed as the wave. This occurs even in the absence of particle collisions.

In essence, some electrons in the plasma can "surf" on the wave, gaining energy from it. This energy transfer causes the wave's amplitude to decrease rapidly, effectively damping it. This process is crucial for understanding wave behavior in plasmas and is related to plasma oscillations. Damping in physics generally refers to the dissipation of energy that restrains vibratory motion.12

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plasma
Higher frequency waves
This phenomenon, called Landau damping, arises because some electrons have the same velocity as the wave. As they move with the wave, they are accelerated much like a surfer on a water wave and thus extract energy from the wave, damping it in the process.
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This phenomenon, called Landau damping, arises because some electrons have the same velocity as the wave. As they move with the wave, they are accelerated much like a surfer on a water wave and thus extract energy from the wave, damping it in the process.
Read More